GRADE & PURITYCarrier Free?Carrier-free — supplied without added carrier protein/stabilizer. Use when carriers (e.g. BSA) would interfere with conjugation or sensitive assays.Bioactive?Bioactive grade — verified to retain biological activity in functional assays. Use when the molecule must be functionally active, not just pure.ActiBioPure™?ActiBioPure™ — Aladdin's premier line for bioactive and recombinant products. Use when both high purity and preserved biological activity are required.Azide Free?Azide-free — without sodium azide preservative. Use in conjugations, cell work, or assays where azide is toxic or inhibitory.His Tag?His tag grade — recombinant protein bearing a His tag for affinity purification/detection. Use to purify, immobilize, or detect the tagged protein.PBS Only?PBS-only formulation — supplied in phosphate-buffered saline with no other additives. Use when you need a clean PBS buffer free of stabilizers/carriers.≥95%(SDS-PAGE)
Expression System
E. coli
Accession #
Q14116
Protein Tag
N-His
Expression system
E. coli
Endotoxin Concentration
<1.0 EU/μg
Bioactivity
1. Immobilized Recombinant Human IL-18 Bpa Protein (rp169678) at 2.0 μg/mL can bind Recombinant Human IL-18 Protein (rp156177) with the EC50 of 24.67 ng/mL. 2. Measured by its binding ability in a functional ELISA. Immobilized human IL-18 (rp156177) at 2.0 μg/mL can bind GSK 1070806 (anti-IL-18) (Ab177855).
Carrier Free,Bioactive,ActiBioPure™,Azide Free,His Tag,PBS Only,≥95%(SDS-PAGE) ActiBioPure™,Azide Free,Bioactive,Carrier Free,His Tag,PBS Only for sensitive chromatographic and analytical workflows requiring minimal baseline interference.
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Storage & shipping
Store at -20°C,Avoid repeated freezing and thawing Ships Ice chest + Ice pads Check lot-specific COA for exact specifications.
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Quality documents
SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.
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Literature proof
Cited in 0 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.
Overview
Purity: >95%, by SDS-PAGE visualized with Coomassie® Blue Staining Description: Interleukin-18 (IL-18) is a proinflammatory cytokine in the IL-1 family that exerts distinct immune effects depending on the local cytokine environment. It is expressed as a 24 kDa precursor by endothelial and epithelial cells, keratinocytes, gamma δ T cells, and phagocytes. The precursor is activated intracellularly by Caspase-1 mediated proteolysis to release the 17 kDa mature cytokine. The precursor can also be released by necrotic cells for extracellular cleavage by multiple proteases. IL-18 activation is induced by infection or tissue damage and contributes to disease pathology in chronic inflammation. IL-18 binds to the widely expressed IL-18 R alpha which recruits IL-18 R beta to form the signaling receptor complex. Its bioactivity is negatively regulated by interactions with IL-18 binding proteins and virally encoded IL-18BP homologs. In the presence of IL-12 or IL-15, IL-18 enhances anti-viral Th1 immune responses by inducing IFN-gamma production and the cytolytic activity of CD8+ T cells and NK cells. In the absence of IL-12 or IL-15, however, IL-18 promotes production of the Th2 cytokines IL-4 and IL-13 by CD4+ T cells and basophils. In the presence of IL-1 beta or IL-23, IL-18 induces the antigen-independent production of IL-17 by gamma δ T cells and CD4+ T cells. IL-18 also promotes myeloid dendritic cell maturation and triggers neutrophil respiratory burst. In cancer, IL-18 exhibits diverse activities including enhancing anti-tumor immunity, inhibiting or promoting angiogenesis, and promoting tumor cell metastasis. Mature human IL-18 shares approximately 63% amino acid sequence identity with mouse and rat IL-18. Alternative splicing in human ovarian cancer generates an isoform that is resistant to Caspase-1 activation. A cell surface form can be expressed on M-CSF induced macrophages and released in response to bacterial endotoxin.
1. Immobilized Recombinant Human IL-18 Bpa Protein (rp169678) at 2.0 μg/mL can bind Recombinant Human IL-18 Protein (rp156177) with the EC50 of 24.67 ng/mL. 2. Measured by its binding ability in a functional ELISA. Immobilized human IL-18 (rp156177) at 2.0 μg/mL can bind GSK 1070806 (anti-IL-18) (Ab177855).
17.8 kDa, under reducing condition; 17.8 kDa, under non-reducing condition
Molecule Type
Protein
Storage and Shipping
Shape
Lyophilized
Reconstitution
We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Reconstitute at 1.0 mg/mL in sterile distilled water. Stock solutions should be apportioned into working aliquots and stored at ≤ -20 °C. Further dilutions should be made in appropriate buffered solutions.
Storage
Store at -20°C,Avoid repeated freezing and thawing
Shipped In
Ice chest + Ice pads
Stability And Storage
Store at -20°C stable up to 1 year. Avoid freeze / thaw cycle.
Images
Recombinant Human IL-18 protein (rp156177) - ELISA Immobilized Recombinant Human IL-18 protein (rp156177) at 2.0 μg/mL can bind GSK 1070806 (anti-IL-18) (Ab177855) with the EC50 of 481.8 ng/mL.
Recombinant Human IL-18 Protein (rp156177) - SDS-PAGE 3 μg/lane of Recombinant Human IL-18 Protein was resolved with SDS-PAGE under reducing (R) and non-reducing (N) conditions and visualized by Coomassie® Blue staining, showing a band at 17.8 kDa.
Recombinant Human IL-18 Protein (rp156177) - Binding Activity Immobilized Recombinant Human IL-18 Bpa Protein (rp169678) at 2.0 μg/mL can bind Recombinant Human IL-18 Protein (rp156177) with the EC50 of 24.67 ng/mL.
Documentation
📋 Safety Data Sheet (SDS)
Comprehensive hazard, handling, storage, and regulatory compliance document.
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